Immersion Technique Research Articles

Post harvest hot water immersion treatment as sustainable approach for artificial curing of immature dates to reduce wastage

Unfavorable climatic conditions hinder the natural ripening of date fruit, resulting in significant wastage. This study highlighted the impact of artificial ripening on quality of immature dates (cvs. Khadrawi, Jihadi, Hillawi, and Mansi) which were pretreated with hot water (95 °C) immersion (HWI) technique for different time intervals (0 s, 30s, 1, 2 and 3 min) and dried at 48 ± 2 °C for 48 h. HWI significantly affected quality of dates; losses being higher with longer immersion intervals. Pre-treated dates (HWI-30 s) showed improved color and higher ripening index; with considerable sugars, fibre (10.00–12.59 %), protein (3.08–3.87 %), phenolics (214.3–507.65 mg GAE/100 g), flavonoids (209.31–454.57 mg QE/100 g), carotenoids (115.98–172.63 mg/100 g), antioxidants (606.62–926.16 μg TE/g), macro (potassium 703.85–860.93 mg/100 g) and micro (iron 4.0–5.85 mg/100 g) minerals. Organoleptic evaluation revealed higher acceptability for Khadrawi and Jihadi cultivars after HWI-30s.FTIR spectra indicated presence of phenols, organic acids, sugars and dietary fibre components retained in the HWI pretreated date samples.

New immersive alcohol marketing and commerce in metaverse environments.

The study aims are to: (i) explore methods for identifying alcohol company marketing in metaverses; (ii) identify current types of alcohol marketing in metaverses; and (iii) identify dominant portrayals and meanings of alcohol marketing in these settings. Our design was exploratory, employing various approaches to identify alcohol company marketing across multiple metaverses. In stage one, we systematically navigated through metaverses as an avatar, documenting and coding all instances of alcohol company marketing. In stage two, the research team collaboratively explored and discussed excerpts of this marketing. The team thematically analysed the transcribed discussion, identifying key meanings and interpretations of immersive and interactive alcohol marketing. Stage one: alcohol company marketing was identified in two metaverses, Decentraland and Sandbox. Within those metaverses were five alcohol company marketing experiences: Heineken Silver, Jose Cuervo Tequila, Wisher Vodka, San Matias Tequila, and Mason Martell Cognac. Marketing strategies included immersive commerce, virtual drinking, immersive branding, immersive engagement, gaming, non-fungible tokens (digital assets), education, non-player characters promoting brands and virtual event-based marketing. Stage two: themes identified were: (i) immersive branding, representing continued exposure to brands that were both foregrounded and on the edge of users' awareness; (ii) immersive engagement, including alcohol-related gaming, quests, and alcohol production; (iii) avatars simulating drinking behaviour (virtual drinking); and (iv) immersive commerce representing how metaverse alcohol marketing may drive alcohol transactions. Alcohol companies are using novel immersive marketing techniques in metaverses. The impact on the experiences and drinking behaviours of users are unknown and require investigation.

Safety and efficacy of endoscopic submucosal dissection with gel immersion technique for superficial esophageal neoplasms.

Gel immersion (GI) endoscopy provides a good visual field in endoscopic submucosal dissection (ESD); however, its clinical outcomes are poorly understood. This study aimed to compare the treatment outcomes between esophageal gel immersion endoscopic submucosal dissection (GI-ESD) and conventional ESD (C-ESD) to determine the safety and efficacy of GI-ESD. The data of 71 consecutive patients who underwent esophageal ESD between April 2021 and March 2023 at a Japanese tertiary center were retrospectively reviewed. GI was achieved using an additional irrigation tube. The treatment outcomes between the GI-ESD and C-ESD groups were compared using inverse probability of treatment weighting (IPTW) to control for confounding factors. A total of 75 superficial esophageal epithelial neoplasms (41 in the C-ESD and 34 in the GI-ESD groups) were treated using ESD. The mean procedure time in the GI-ESD group was significantly shorter than that in the C-ESD group (59.2±36.2 vs 85.3±45.7min, P=0.008). After IPTW adjustment, the mean procedural times were 62.6±36.6 and 82.9±41.7min in the GI-ESD and C-ESD groups, respectively (P=0.037), and the incidence rate of muscle layer damage was 4.2% in the GI-ESD group and 30.6% in the C-ESD group (P=0.001). In the multivariate analysis, specimen size ≥30mm (odds ratio [OR]: 9.44, 95% confidence interval [CI]: 2.46-36.30, P=0.001) was positively correlated with longer procedural time (≥90min), whereas GI-ESD (OR: 0.19, 95%CI: 0.05-0.68, P=0.011) showed a negative association. Esophageal GI-ESD may be useful in terms of safety and time efficiency. The GI technique could be an option for esophageal ESD.

Highly Sensitive Phased Array Probes based on Capacitive Micromachined Ultrasonic Transducers

Capacitive Micromachined Ultrasonic Transducers (CMUTs) offer a wide freedom of design for ultrasonic phased arrays. They are characterized, in comparison to piezoelectric transducers, by a higher sensitivity in receiving and a wider bandwidth based on their physical properties. Especially in combination with integrated preamplifiers the high receiving sensitivity compensates or rather overcompensates the lower transmission power of the CMUT in single probe applications with pulse-echo technique. This asymmetric behavior opens new opportunities in the application. In medical diagnostics it allows to meet the maximum permissible ultrasonic radiation force with the best sensitivity. In nondestructive testing the transmission power can be increased by the combination of a piezoelectric probe for transmitting and a CMUT probe for receiving. Especially in double probe techniques, such as pitch-catch or time-of-flight diffraction (TOFD), this is an efficient extension of the conventional approach with two piezoelectric transducers. The CMUT array probes developed by Fraunhofer IPMS with integrated preamplifier and bias voltage converter powered by a standard USB-A connector can be applied as one to one substitute for piezoelectric phased arrays with commercially available ultrasonic devices without adaption or additional electronics. The CMUT arrays are best suited for immersion technique and medical sonography because of their natural matching to water-like materials. They are applicable as well for solid surfaces with a special coating. We present the first results of ultrasonic imaging with our CMUT array probes in comparison with a commercially available piezoelectric phased array probe.

Triboelectric Nanogenerator Based on Tin Doped Zinc Oxide and Polyvinyl Alcohol Composite Thin Film for Energy Harvesting Applications

The triboelectric nanogenerator (TENG) collects mechanical energy from its surroundings and converts it to electrical signals that can be used in sustainable energy harvesting technologies to help maintain the social ecosystem. However, TENG operation with pure triboelectric material may not be sufficient to power a small electronic system without modification. The optimal material capable of producing significant electrical energy with flexible structures remains a major barrier to practical application. In this study, tin-doped zinc oxide (Sn:ZnO) and polyvinyl alcohol (PVA) composite thin films were prepared using a simple solution immersion technique at various Sn atomic percentage (at.%) concentrations for use in TENG devices. The crystalline quality of a composite thin film made of Sn:ZnO and PVA was identified using x-ray diffraction. The microstructure changes of the composite thin film were found to be influenced by Sn doping, as studied using optical microscopy. The TENG with 2.5 at.% Sn:ZnO/PVA composite thin film and Kapton film achieved the highest peak voltage of 8.5 V in open circuit and 90 µW output power at 1 MΩ. The produced electrical output was then used to store energy in capacitors. According to its TENG properties, the Sn:ZnO/PVA composite thin film-based TENG has the potential to be used in low power electronic devices.

From Food Industry 4.0 to Food Industry 5.0: Identifying technological enablers and potential future applications in the food sector.

Although several food-related fields have yet to fully grasp the speed and breadth of the fourth industrial revolution (also known as Industry 4.0), growing literature from other sectors shows that Industry 5.0 (referring to the fifth industrial revolution) is already underway. Food Industry 4.0 has been characterized by the fusion of physical, digital, and biological advances in food science and technology, whereas future Food Industry 5.0 could be seen as a more holistic, multidisciplinary, and multidimensional approach. This review will focus on identifying potential enabling technologies of Industry 5.0 that could be harnessed to shape the future of food in the coming years. We will review the state-of-the-art studies on the use of innovative technologies in various food and agriculture applications over the last 5 years. In addition, opportunities and challenges will be highlighted, and future directions and conclusions will be drawn. Preliminary evidence suggests that Industry 5.0 is the outcome of an evolutionary process and not of a revolution, as is often claimed. Our results show that regenerative and/or conversational artificial intelligence, the Internet of Everything, miniaturized and nanosensors, 4D printing and beyond, cobots and advanced drones, edge computing, redactable blockchain, metaverse and immersive techniques, cyber-physical systems, digital twins, and sixth-generation wireless and beyond are likely to be among the main driving technologies of Food Industry 5.0. Although the framework, vision, and value of Industry 5.0 are becoming popular research topics in various academic and industrial fields, the agri-food sector has just started to embrace some aspects and dimensions of Industry 5.0.

Diagnostic Yield of the Number of Duodenal Biopsies in Celiac Disease

Abstract Background The diagnosis of celiac disease relies on a combination of clinical evaluation, serological testing, and histopathological examination of duodenal biopsies. However, there is ongoing debate regarding the optimal number of duodenal biopsies required for an accurate diagnosis, as well as the isolated yield of water interface directed biopsy. Aim The primary objective is to determine the cumulative benefit of multiple duodenal biopsies, establishing the specificity and sensitivity of each biopsy separately with focus on the isolated yield of water interface directed biopsy. Methods A Cross-sectional study conducted on 22 children with symptoms and signs suggestive of celiac disease (CD) and positive serology with antitissue transglutaminase antibodies at the pediatric gastrointestinal endoscopy Unit at EL Demerdash Hospital, Ain Shams University for 6 months. four biopsies were taken, one from duodenal bulb, and 2 from rest of duodenum and the fourth one using water immersion technique visualizing the most affected area. Results Among the 22 enrolled children, 18 patients were histopathologically positive for celiac disease and 4 children were negative. The bulb, duodenal, and water interface biopsies were positive in 94.4%, 88.8%, and 66.7% respectively, of those positively diagnosed as celiac disease by Marsh criteria. In addition, bulb, and duodenal biopsies have the highest sensitivity of 94.4%, and 88.9%, respectively, also, they have the highest accuracy. Duodenal bulb biopsies were capable alone to diagnose 17 out of 18 definite cases. The missed case diagnosis was reached either by water interface or any random duodenal biopsy. Conclusion Bulb biopsy showed to be the most accurate in diagnosing celiac disease, on the contrary, water interface biopsy was not sensitive in diagnoses, so the celiac diagnostic efficacy can be reached by assessment of 2 duodenal biopsies, one of them from the duodenal bulb.

Improving transient gene expression and agroinfiltration‐based transformation effectiveness in Indonesian orchid Phalaenopsis amabilis (L.) Blume

Transient gene expression is an approach used to study transient genes across various species, with infiltration by Agrobacterium tumefaciens (agroinfiltration) being a commonly used method. Agroinfiltration offers a simple and effective means of delivering transgenes into the plant genome. An alternative method for enhancing the quality and productivity of orchids as ornamental plants is genetic modification through agroinfiltration. Although Agrobacterium‐mediated genetic transformation by immersion has been used on the Phalaenopsis amabilis (L.) Blume species of orchid, transformation efficiency using the immersion technique remains relatively low and the method itself is challenging due to its requirement for aseptic handling. The application of agroinfiltration in P. amabilis has not previously been reported. This study investigates the impact of the injection site, acetosyringone concentration, bacterial density (OD600), and injection volume to determine the optimum conditions for agroinfiltration on P. amabilis. The results demonstrated that injection site had a noticeably distinct impact on transformation effectiveness, with the abaxial position of the leaf being the optimal site for Agrobacterium culture suspension injection. While adjustments in acetosyringone concentration, bacterial density (OD600), and injection volume did not significantly affect transformation efficiency, they did influence the peak time of GFP fluorescence. Acetosyringone at a concentration of 200 µM, an OD600 of 1.0 for Agrobacterium culture, and an injection volume of 500 µL effectively accelerated GFP expression duration.

Pulsed electroplating of ZrO2-reinforced Ni-Cr alloy coatings from the duplex complexing agents-containing bath for engineering applications: Importance of operating conditions

The progress in tribocorrosion performance of the engineering parts is in dire need of improving their surface properties. In the present contribution, Ni-Cr-ZrO2 layers were electrodeposited on St37 steel. The stress was put on optimizing the process factors, including the parameters involved in pulsed current electrodeposition and level of the ZrO2 reinforcing nanoparticles (0–20 g/L) in the bath. The surface characteristics of the electrodeposits were evaluated using FESEM, EDS, AFM, and XRD. The tribomechanical characteristics of the films were determined using a Vickers microhardness tester and pin-on-disk apparatus. The electrochemical behavior of the samples was studied using OCP, EIS, PDP, and immersion techniques. The results demonstrated that the included ZrO2 nanoparticles led to more homogenous, rougher, and defect-free surfaces, while they did not change the phase composition of the alloy electrodeposits. The polarization resistance of the Ni-Cr alloy coating increases by 6.7 times when 10 g/L of the reinforcing nanoparticles is added to the electrolyte. A decrease of ≈42 % in the mean COF value was obtained by the incorporation of 10 g/L ZrO2 nanoparticles into the plating bath. The coating system developed holds the promise to address both technical requirements and health concerns.

Effects of Psychogenic Stress Frequency during the Growth Stage on Oxidative Stress, Organ and Bone Development.

This study aimed to examine the effects of psychogenic stress (PS) frequency on oxidative stress and organ development during growth and to gain fundamental insights into developmental processes during this period. Four-week-old male Wistar rats were randomly assigned to a control and three PS groups according to PS frequencies. PS was induced using restraint and water immersion techniques once daily for 3 hr at a time for a period of 4 weeks. Oxidative stress increased with increasing PS frequency. The weights of organs other than the adrenal glands significantly decreased with increasing PS frequency, indicating growth suppression. Furthermore, bone morphology, weight, and length significantly decreased with increasing PS frequency. High-frequency PS exposure during developmental growth significantly negatively affects oxidative stress and organ and bone development. In particular, increased oxidative stress due to excessive PS has detrimental effects on organ and bone growth.

Immersion and Invariance-Based Linear Tracking and Regulation Controller for Depth Position of an AUV

This paper addresses the tracking control challenge in the diving motion system of a specific class of autonomous underwater vehicles (AUVs) characterized by a torpedo-like shape. A decoupled and reduced-order three degrees-of-freedom linearized diving motion model is employed for depth position control. A control law is synthesized using the immersion and invariance (I&I) technique to achieve the control objectives. The primary aim is to attain tracking by immersing a stable, lower-order target (second-order) dynamic system into a three-dimensional manifold, upon which the closed-loop system evolves. We address the regulation problem as a specialized instance of the tracking problem, with the reference input set as a predetermined known depth that requires regulation. The efficacy of the proposed control law is evaluated through simulation studies involving various scenarios. Robustness tests are conducted to assess the control law’s performance under modeling uncertainties and underwater disturbances. The computer simulation employs an AUV named MAYA, utilizing experimentally validated diving motion parameters. A comparative analysis is performed between the proposed control law and other benchmark controllers to gauge its performance. Additionally, the effectiveness of the proposed control law is confirmed by validating its application to the nonlinear model of the diving motion system.

Effect of marination process with different formulation applied to beef on physio-chemical quality parameters and sensory properties of meat themed thesis

Marinating is a technique applied to soften, flavor and extend the shelf life of meat before cooking. In this study, it was aimed to determine the changes in physico-chemical quality parameters of beef marinated with juice and powder forms of red beet, black carrot and purple onion vegetables, which are rich in antioxidants, and to determine the level of consumer appreciation. Meat samples were marinated for 24 h at +4 °C using 1:1 immersion technique for vegetable juices and 10% massage technique for powder forms. Experimental and mixed methods were used in the study. As a result of the marinating process applied in the study, the interactions of color, cooking loss, texture (TPA), pH, dry matter, total phenolic matter and antioxidant activity content of meat samples in different forms of different materials (juice-powder), physico-chemical analyzes in different applications (raw-cooked) were examined. In addition, sensory analysis was carried out with a group of 28 semi-trained panelists for cooked meat samples. SPSS (26.0) statistical package program was used to analyze the data obtained. As a result of the research, all of the materials used in the marination process (red beet, black carrot and purple onion) showed acidic properties. In terms of total phenolic matter content, it was measured that the powder forms of the vegetables contained more total phenolic matter compared to the juice forms. The antioxidant activity content of the powdered vegetables was found to be higher than the juice formed ones.

Occupational safety management and human reliability testing during the operation of a plastic injection molding machine

Work safety is a key element in the design and maintenance of industrial workplaces and processes. This article examines occupational safety and the reliability of the human factor in the role of a plastic injection molding machine operator. Analyzing the work process and the dangerous, harmful, and burdensome factors present in the environment and workplace allowed for the identification of occupational hazards. Additionally, factors such as the frequency of threats, the likelihood of events, the possibility of avoiding and limiting damage, and the consequences of events were considered to conduct an occupational risk assessment according to the JSA (Job Safety Analysis) method. Following this, human reliability was assessed by determining the probability of operator errors using the TESEO and HEART methods. Finally, the possibility of using selected immersion techniques on the results of the research was discussed. The research methods and tools used in this study included a literature review and analysis, observation, interviews, and inference.

Mint: Integrating scientific visualizations into virtual reality

We present an image-based approach to integrate state-of-the-art scientific visualization into virtual reality (VR) environments: the mint visualization/VR inter-operation system. We enable the integration of visualization algorithms from within their software frameworks directly into VR without the need to explicitly port visualization implementations to the underlying VR framework—thus retaining their capabilities, specializations, and optimizations. Consequently, our approach also facilitates enriching VR-based scientific data exploration with established or novel VR immersion and interaction techniques available in VR authoring tools. The separation of concerns enables researchers and users in different domains, like virtual immersive environments, immersive analytics, and scientific visualization, to independently work with existing software suitable for their domain while being able to interface with one another easily. We present our system architecture and inter-operation protocol (mint), an example of a collaborative VR environment implemented in the Unity engine (VRAUKE), as well as the integration of the protocol for the visualization frameworks Inviwo, MegaMol, and ParaView. Our implementation is publicly available as open-source software.Graphical abstract

Force-Directed Immersive 3D Network Visualization

Network visualization, in mathematics often referred to as graph visualization, has evolved significantly over time, offering various methods to effectively represent complex data structures. New methods and devices advance the possibilities of visualization both from the point of view of the quality of displayed information and of the possibilities of visualizing a larger amount of data. Immersive visualization includes the user directly in presented visual representation but requires a native 3D environment for direct interaction with visualized information. This article describes an approach to creating a force-directed immersive 3D network visualization algorithm available for application in immersive environments, such as a cave automatic virtual environment or virtual reality. The algorithm aims to address the challenge of creating visually appealing and easily interpretable visualizations by utilizing 3D space and the Unity engine. The results show successfully visualized data and developed interactive visualization methods, overcoming limitations of basic force-directed implementations. The main contribution of the presented research is the force-directed algorithm with springs and controlled placement as an immersive visualization technique that combines the use of springs and attractive forces to stabilize a network in a 3D environment.

Gel immersion technique in interventional endoscopic ultrasound for pancreatobiliary lesions.

Gel immersion technique in interventional endoscopic ultrasound for pancreatobiliary lesions.

Fogging vs immersion techniques for sustainable pathogen inactivation on stainless steel surfaces using commercial sanitizers

Fogging or aerosolization can be considered a sustainable method for hygiene in the food environment, based on the diffusion of a fine mist into the air using liquid disinfectant, enabling the decontamination step to have three-dimensional coverage, reaching even difficult-to-access areas. This study aimed to evaluate the decontamination process and microbiological inactivation of three pathogens: Salmonella typhimurium, Escherichia coli, and Staphylococcus aureus. It compared fogging with traditional immersion methods using two commercial sanitizers: one with sodium hypochlorite (200 ppm) and the other with peracetic acid (108 ppm). Stainless steel surfaces were tested over four time points for 15 min. Fogging with the sodium hypochlorite-based disinfectant reduced S. aureus by 4.4 logs and S. Typhimurium and E. coli by at least 5 logs. The peracetic acid-based disinfectant achieved a reduction of 5.4 logs for S. aureus and at least 6 logs for S. Typhimurium and E. coli. In addition to the effect on microbial inactivation, the Fogging technique resulted in a reduction in the consumption of sanitizing solution by approximately 50% compared to the immersion process, after 15 min. The results of this study show that the decontamination step using fogging of commercial sanitizers can be of great assistance in microbiological control in factories and an alternative to be explored reducing the quantity of water in relation with traditional immersion method.

Distributed event‐triggered fixed‐time formation tracking control for multi‐spacecraft systems based on adaptive immersion and invariance technique

AbstractIn this study, the problem of fixed‐time formation tracking for multi‐spacecraft systems without internal collisions was investigated. Aiming to ensure that the formation members can accurately realize and maintain the required configuration within the user‐given time, we designed a novel adaptive immersion and invariance (I&I)‐based control protocol. The novelty here lies in two aspects. First and foremost, this study was based on the adaptive I&I technique, combined with a new artificial potential function, to achieve the desired formation tracking without internal collision. Second, unlike the asymptotic convergence of the traditional I&I‐related works, to guarantee the fixed‐time stability, the proposed protocol introduced the prescribed performance control, which can also alleviate the possible system performance degradation caused by the non‐periodic control signal update of the event‐triggered mechanism. Further, the introduction of the event‐triggered mechanism can reduce the unnecessary information interaction. Lyapunov stability analysis shows that this proposed protocol can enable the defined implicit manifold to converge to the origin for the most initial conditions. Also, benefiting from the prescribed performance techniques, the convergence time can eliminate the dependence of the system on designed controller parameters or initial system conditions, relying only on the actual mission requirements. In addition, we adopted a linear extended state observer to deal with the parameter uncertainties and external disturbances, and used the I&I adaption to estimate the observer errors, thus further improving the system performance. Moreover, a new exponential‐type artificial potential function was designed to avoid close proximity between formation members and prevent internal collisions. Finally, numerical simulations were conducted to verify the theoretical results.

Use of Non-Destructive Ultrasonic Techniques as Characterization Tools for Different Varieties of Wine.

In this work, we have verified how non-destructive ultrasonic evaluation allows for acoustically characterizing different varieties of wine. For this, a 3.5 MHz transducer has been used by means of an immersion technique in pulse-echo mode. The tests were performed at various temperatures in the range 14-18 °C. The evaluation has been carried out studying, on the one hand, conventional analysis parameters (velocity and attenuation) and, on the other, less conventional parameters (frequency components). The experimental study comprised two stages. In the first, the feasibility of the study was checked by inspecting twelve samples belonging to six varieties of red and white wine. The results showed clearly higher ultrasonic propagation velocity values in the red wine samples. In the second, nine samples of different monovarietal wine varieties (Grenache, Tempranillo and Cabernet Sauvignon) were analyzed. The results show how ultrasonic velocity makes it possible to unequivocally classify the grape variety used in winemaking with the Cabernet Sauvignon variety having the highest values and the Grenache the lowest. In addition, the wines of the Tempranillo variety are those that present higher values of the attenuation coefficient, and those from the Grenache variety transmit higher frequency waves.

A Novel ultrasensitive nitrite ion detection using tungsten trioxide-modified gold electrode

A novel ultrasensitive nitrite ion detection using tungsten trioxide/carbon (WO3/C) modified gold electrode has been studied. The WO3 was synthesized from tungsten metal through chemical methods with selective precipitation techniques. The visual color of the material obtained is bright yellow, indicating WO3 compound. The X-ray diffraction (XRD) diffractogram confirms WO3 compound in monoclinic shaped by showing of the 2θ at 23.205, 23.723, 24.384, 33.426, and 33.911. The characterization using Field Emission Scanning Electron Microscopy (FESEM) showed that the material obtained was a disk-shaped with diameter 150–250 nm and a thickness of 50 nm. The Energy Dispersive X-ray spectroscopy (EDX) also confirms WO3 compound with no impurities. The gold electrode was modified by dip immersion technique where the gold electrode was dipped in a mixture of WO3-carbon paste. The measurement of surface area by cyclic voltammetry shows that the WO3/C modified gold electrode has the highest surface area compared to unmodified gold and C-modified gold electrode, indicating it has more active electron transfer sites. The WO3/C modified gold electrode worked well at pH 7 for the detection of nitrite ion and gave the highest peak current (0.875 V) than the others. The measurement ranges from 1–200 mg/L with no interference from NO3−, SO42−, Zn2+, Fe2+, Pb2+, Cl−, Ca2+, and NH4+ ions. The sensitivity and the LOD of the electrode are 8.86 μA.L.mg−1.cm−2 and 0.8 µg/L, respectively. The proposed method not only exhibits identical precision and accuracy to the standard method in detecting nitrite ions in real samples but also offers the advantages of rapid analysis, uncomplicated pretreatment procedures, environmental friendliness, and economical operation. This performance indicates that the WO3/C modified gold electrode is feasible as an alternative electrode for nitrite ion detection.